Headset



FIG. 1 is a front perspective view of my design;

FIG. 2 is a front view;

FIG. 3 is a first side view;

FIG. 4 is a second side view;

FIG. 5 is a rear view;

FIG. 6 is a top view; and,

FIG. 7 is a bottom view.

The broken lines in the Figures depict portions of the headset that form no part of the claimed design. 

CLAIM The ornamental design for a headset, as shown and described. 